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	<head>
        <link rel="stylesheet" type="text/css"href="style.css">
		<meta charset="UTF-8">
		<title>课堂任务A</title>
        <style>
            .A{width:221px;height:190px;background-image:url(img/上海.png);padding: 5px 0px 5px 5px;float：left;}
            .B{width:221px;height:190px;background-image:url(img/成都.png);padding: 5px 0px 5px 5px;float：left;}
            .C{width:221px;height:190px;background-image:url(img/北京.png);padding: 5px 0px 5px 5px;float：left;}

         </style>
	</head>
	<body>
        <p>课堂任务A</P>
        <div class="A"></div>
        <div class="B"></div>
        <div class="C"></div>

	</body>
</html>